Lubricator for air drills



May 19, 1925 A. NELSON LUBRICATOR FOR AIR DRILLS Filed Sept. 2, 1924Patented May 19, 1 925.

STATES isaatit rarest caries.

ADOLFI-I NELSON, OF HUGO, COLORADO.

LUBRIOATOR FOR AIR DRILLS.

Application filed September 2, 1924.

' of the invention, such as will enable others skilled in the art towhich it appertains to make and use the same, reference being had to theaccompanying drawings, and to the characters of reference markedthereon, which form a part of this specification.

This invention relates to lubricating de vices and has special referenceto a device for lubricating the cylinders of air drills and analogousdevices.

Itis well known to those who perience in the operation of air variouskinds and especially the rock drills, that they are often damaged frominsufficient lubrication. An air-oper ated device presents difficultiesin lubrication that are not present in steamoperated devices of asimilar nature. Steam must naturally be at a temperature higher than theboiling point of water, as it cannot exist as steam at lowertemperatures. The machine employing steam is therefore hot. Compressedair, unless heated previously to its introduction into the machine,enters the machine at the temperature of the surrounding air andconsequently produces very low temperatures within the drill as itexpands. This interferes to some extent with the lubrication.

It is my intention to provide a lubricating device which is adapted toforce a lubricant into the stream of air passing to the drill. Thislubricant will enter with the air and cause the valves and cylinder wallto be properly lubricated in spite of the low temperature therein.

My invention can be most clearly described and will be most readilyunderstood when reference is had to the accompanying drawing, in whichthe invention is illustrated, and in which the single figure shows avertical section of my lubricator, portions being shown in elevation tobetter disclose the actual construction.

Numeral 1 designates the body member of the lubricator which is anelongated tubular have exdrills of ordinar y Serial No. 735,365.

member provided at each end with threads 2 and 3, which correspond,respectively, with the intake and the delivery ends of the device.intake end is a plug valve having aplug member 4, which is tapered andis rotatable within a correspondingly tapered opening. ()n the lowerside of the body member there is a projecting cylindrical wall 5provided with an externally threaded portion 6 to which the cap 7 isoperatively connected.

A washer 8 has a central sphericalprojed,

tion 9 and is pressed against the lower end of the plug 4 by means of aspring 10 which serves to hold the plug properly seated. The cap has aportion 11 of its outer surface hexagonal so that it can be convenientlyrotated by means of a r ch. The upper end 12 of the plug is non-circularand adapted to be engaged by a handle 13 by means of which it may berotated. By rotating the plug 1 ninety degrees, the passageway 14 can beopened or closed at will. Just beyond the plug, the body member isprovided with a cylindrical recess bounded by the internally threadedwall 15. An opening 16 of less diameter than the recess connects thelatter with the passageway 14. A perforated disk 17 rests on theshoulder formed by the flange 18.

Threadedly connected with the wall 15 is a cylinder 19 whose innersurface is smooth and adapted to receive a piston 20, which is providedwith an ordinary piston ring 21. A gasket 22 fits between the upper endof wall 15 and the lower surface of the hexagonal portion 23 of thecylinder.

The outer surface of the cylinder above the hexagonal portion 23 isthreaded for the reception of the elongated cap 24 whose upper end isclosed by a wall 25 and has a hexagonal portion 26 which may be engagedby a wrench. The piston has secured thereto a threaded stem 27 whichcooperates with the threaded opening 28 in wall 25. The upper end of thestem 27 has a square portion 29, by means of which it may be engaged bya wrench and rotated. With the parts assembled in the manner shown, itis obvious that the piston can be moved up and down within the cylinderby rotating the stem 27.

Let us now assume a case in which the end having the threads 2 isconnected to a source Located a short distance from the of compressedair, while the other end is connected to an air drill or similarapparatus. By means of, the plug l, thepassa eway 1 1: is opened orclosed; as" above-J explained. l/Vith the valve closed, let us re movethe cap Qet and the piston 2Qfrom the cylinder 19 and fill the latterwith a suitable hard oil or grease. The cap,2 4l is then're; placed withthe piston in its uppermostposi tion. By turning the stem 27, the pistoncan be moved downwardly, by which action grease isj forced, through theopenings. in thediskqll' into the passagewaylt where it 'is, cau ht; upby, theswiftly flowing air stream and, carried tothe machine to be lubriated In. the. mamier described and with the means disclosed, it ispossible to lublfilctate the drill wh'eneVer desired with theminimumamount of labor and without intlerruptingthe operation;

' Fromithe'above description it will be apparent that I have produced asimple device that can. be applied: to any? existing air drill withoutthe necessity of changing the latter the least. I

Having now described my invention, what I claim as new is:

A lubricating device for mechanisms adapted" to' be operated bycompressed air comprising, in combination, a tubular body member adaptedto be connected in an air line conecting' source of compressed air to amachine, the body member being provided with stopcock adjacent the endearest the. air supply, Said body member having a circular recess in oneside thereof and an openingof smaller diameter. than the recessconnectin the latter with; the passageway in the %odjyjmember, aperforated, disk, in the, bottom of; said recess, a, cylinder thread dlyconnected. to, the wall of the recess, a cap, threadedly connected tothe outer surfaces of the cylinder, a piston. within said cylinder, anda threaded; stem connected to, the piston, said stem being, threadedlyconnected with the cap. whereby; the rotation of the stem will move the,piston within the cylinder,

In testimony. whereof I- aflix my signature.

ADOLFH NELSON.

